To join the fun, just head to Google Maps from any web browser. Find a good spot on the map, then click the "Pac-Man" overlay button near the bottom-left corner. On the older version of maps, this button will be in the sidebar.

Gameplay is simple—just use your keyboard's arrow buttons to navigate around the map and collect dots while avoiding the ghosts. No word yet on how long this mini-game will stay around, though I can't imagine it'll be available very long after April 1st.